Datasheet

bq24100, bq24103, bq24103A

bq24104, bq24105, bq24108, bq24109

bq24113, bq24113A, bq24115

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SLUS606O –JUNE 2004–REVISED MARCH 2010

Sleep Mode

The bqSWITCHER enters the low-power sleep mode if the VCC pin is removed from the circuit. This feature

prevents draining the battery during the absence of VCC.

Charge Status Outputs

The open-drain STAT1 and STAT2 outputs indicate various charger operations as shown in Table 1. These

status pins can be used to drive LEDs or communicate to the host processor. Note that OFF indicates that the

open-drain transistor is turned off.

Table 1. Status Pins Summary

Charge State STAT1 STAT2

Charge-in-progress ON OFF

Charge complete OFF ON

Charge suspend, timer fault, overvoltage, sleep mode, battery absent OFF OFF

Table 2. Status Pins Summary (bq24104, bq24108 and bq24109 only)

Charge State STAT1 STAT2

Battery absent OFF OFF

Charge-in-progress ON OFF

Charge complete OFF ON

Battery over discharge, V

I(BAT)

< V

(SC)

ON/OFF (0.5 Hz) OFF

Charge suspend (due to TS pin and internal thermal protection) ON/OFF (0.5 Hz) OFF

Precharge timer fault ON/OFF (0.5 Hz) OFF

Fast charge timer fault ON/OFF (0.5 Hz) OFF

Sleep mode OFF OFF

PG Output

The open-drain PG (power good) indicates when the AC-to-DC adapter (i.e., V

) is present. The output turns on

when sleep-mode exit threshold, V

SLP-EXIT

, is detected. This output is turned off in the sleep mode. The PG pin

can be used to drive an LED or communicate to the host processor.

CE Input (Charge Enable)

The CE digital input is used to disable or enable the charge process. A low-level signal on this pin enables the

charge and a high-level V

signal disables the charge. A high-to-low transition on this pin also resets all timers

and fault conditions. Note that the CE pin cannot be pulled up to VTSB voltage. This may create power-up

issues.

Product Folder Link(s): bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115